UI improvements

data/gtk/style.css

@@ -1,6 +1,10 @@
 @define-color accent_color @purple_5;
 @define-color accent_bg_color @purple_3;
 
+#details_view {
+    background-color: white;
+}
+
 #details_view_play_button {
     color: @light_1;
     background-color: @dark_5;